diff --git a/repository/Grafoscopio/GrafoscopioBrowser.class.st b/repository/Grafoscopio/GrafoscopioBrowser.class.st
index 5be152e..6bbce46 100644
--- a/repository/Grafoscopio/GrafoscopioBrowser.class.st
+++ b/repository/Grafoscopio/GrafoscopioBrowser.class.st
@@ -57,6 +57,22 @@ GrafoscopioBrowser class >> configurePandoc [
 
 ]
 
+{ #category : #'as yet unclassified' }
+GrafoscopioBrowser class >> launchHelpInHtml [
+	"Launches the help manual in PDF format in an external viewer."
+	
+	| htmlHelpFileLocation |
+	htmlHelpFileLocation  := (FileSystem disk workingDirectory parent / 'Docs/Es/Manual/manual-grafoscopio.html') fullName.
+	Smalltalk platform name = 'unix'
+		ifTrue: [ 
+			OSProcess command: 'xdg-open ', htmlHelpFileLocation.			
+		].
+	Smalltalk platform name = 'Win32'
+		ifTrue: [ 
+			OSProcess command: 'explorer ', htmlHelpFileLocation.
+		].
+]
+
 { #category : #'as yet unclassified' }
 GrafoscopioBrowser class >> launchHelpInPdf [
 	"Launches the help manual in PDF format in an external viewer."
@@ -151,7 +167,7 @@ GrafoscopioBrowser class >> startDockingBar [
 	helpMenu := MenuMorph new.
 	helpMenu 
 		add: 'Manual en PDF' target: GrafoscopioBrowser action: #launchHelpInPdf;
-	 	add: 'Manual en HTML' target: GrafoscopioBrowser action: #messageNotImplementedYet;
+	 	add: 'Manual en HTML' target: GrafoscopioBrowser action: #launchHelpInHtml;
 		add: 'Manual en grafoscopio' target: GrafoscopioBrowser action: #messageNotImplementedYet;
 		add: 'Ir a la documentación en línea' target: GrafoscopioBrowser action: #messageNotImplementedYet;
 		add: 'Acerca de Grafoscopio' target: GrafoscopioBrowser action: #messageAbout.